The photo evidence provided shows my vehicle stationary past the white line, therefore I believe I was entitled to proceed.
If nobody actually looks at the photographs, and you don't mind risking a custodial sentence for perjury or perverting the course of justice, if you were already fully beyond the whites line(s) when the lights turned red then, ignoring that the restriction also applies to the preceding amber light, subject to the defence of it not being safe to stop, you do not commit the offence.
The offence is committed if any part of your vehicle crosses the stop line (or either of the stop lines where there is also an advanced stop line) in the forward direction while the red light (or amber light is it would have been safe to stop) is showing.
Regardless of what absurd basis upon which you are claiming that the first photo shows your vehicle stationary, whilst it is past the advanced stop line, it is not past the conventional stop line. The light is showing red. There is no *the* white line when there are two applicable white lines.
Whilst the red light was showing your vehicle clearly crossed the conventional stop line and had proceeded half way across the junction.It had crossed that line while the light was red. If you look at the position of the pedestrians stepping out onto the crossing in the first picture and compare with the second picture, the time between photos was very short, and you would have needed to seriously launch your car to cover that distance from your fictitious standstill - which would presumably be evident both from the rear of your car squatting down and the pedestrian on your nearside diving for cover.